20155405124 has 24 divisors (see below), whose sum is σ = 37757680800. Its totient is φ = 9385476480.

The previous prime is 20155405099. The next prime is 20155405141. The reversal of 20155405124 is 42150455102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2242997 + ... + 2251964.

It is an arithmetic number, because the mean of its divisors is an integer number (1573236700).

Almost surely, 2^20155405124 is an apocalyptic number.

It is an amenable number.

20155405124 is a deficient number, since it is larger than the sum of its proper divisors (17602275676).

20155405124 is a wasteful number, since it uses less digits than its factorization.

20155405124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495043 (or 4495041 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 29.

The spelling of 20155405124 in words is "twenty billion, one hundred fifty-five million, four hundred five thousand, one hundred twenty-four".